jdbc/src/main/java/org/apache/metamodel/jdbc/JdbcSchema.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.metamodel.jdbc;

import java.io.ObjectStreamException;

import org.apache.metamodel.schema.MutableSchema;
import org.apache.metamodel.schema.MutableTable;
import org.apache.metamodel.schema.Schema;

/**
 * Schema implementation for JDBC data contexts
 * 
 * @author Kasper Sørensen
 */
final class JdbcSchema extends MutableSchema {

	private static final long serialVersionUID = 7543633400859277467L;
	private transient MetadataLoader _metadataLoader;

	public JdbcSchema(String name, MetadataLoader metadataLoader) {
		super(name);
		_metadataLoader = metadataLoader;
	}

	protected void refreshTables() {
		if (_metadataLoader != null) {
			_metadataLoader.loadTables(this);
		}
	}

	public void loadRelations() {
		if (_metadataLoader != null) {
			_metadataLoader.loadRelations(this);
		}
	}

	public Schema toSerializableForm() {
		MutableTable[] tables = getTables();
		for (MutableTable table : tables) {
			table.getColumns();
			table.getIndexedColumns();
			table.getPrimaryKeys();
		}
		loadRelations();
		return this;
	}

	/**
	 * Called by the Java Serialization API to serialize the object.
	 */
	private Object writeReplace() throws ObjectStreamException {
		return toSerializableForm();
	}
}